Folding seat assemblage to attach to a luggage cart and its deployment linkage

ABSTRACT

A seat with linkage attachable on either side of conventional luggage carts, on both sides, or to the backside, and once the push/pull handle rotates upward, positions itself vertical, for headroom clearance, and simultaneously deploys the seat to horizontal level, for seating, with an extension arm attached to, or part of, the bent projecting arm of the push/pull handle. The seated user&#39;s weight transfers directly to the floor by a U-shaped underseat support, preventing the cart from moving, and when the handle is down, for cart movement, the downward rotation retracts the seat up to stowed position with a torsion spring. The seat can be installed on a corner post of the cart structure, manually rotated to level position around the cart&#39;s corner, providing seating at either side, or back of the cart, and in stow position rests against cart structure. In all embodiments multiple stacking of carts is allowed.

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Provisional Patent No. 60/324.752 of Sep. 25, 2001 and Provisional Patent No. 60/401,592 of Aug. 6, 2002

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

[0002] Not Applicable.

REFERENCE TO A MICROFICHE APPENDIX

[0003] Not Applicable.

BACKGROUND OF THE INVENTION

[0004] The present invention relates and provides a means to a folding seat assemblage to be attached to any typical luggage cart that carries baggage, packages and goods for travelers at airports, as well as ship, train and bus terminals.

[0005] The invention utilizes the seat folding function and general arrangements of prior art, including U.S. Pat. No. 5,547,205 from the same inventor, and adds optional arrangements and attachments to ensure additional safety for the user, and permits practical means for modifying a wide range of cart designs in existence without requiring them to make major changes to their present design, in order to accomodate the use of a seat for a tired traveler. Optionally, if so desired , two seats may be added to the cart, used independently, one on each side.

[0006] Presently, almost all airports, as well as train, bus and ship terminals have available for the travelers luggage carts to help them convey their bagage about the terminals to ticket agents and various objectives while waiting for their transportation to arrive or leave. During these long waiting periods they are obliged to stand, sometimes without any place to rest during extended hours. Recent security problems have increased the wait time and produced long lines of passengers without access to chairs or seats during these periods. In addition, often times a flight would be cancelled or delayed as passengers with small children or the aged must wait standing tiredly since frequently there are no seats available and the carts they use have no provisions for resting during their long delayed wait.

[0007] The present invention has risen to mitigate and/or obviate the afore described disadvantage of the present luggage cart available to the public in that it contains only provisions for carrying passengers' suitcases, bags and parcels, but no provisions for the passengers' personal comfort, i.e., seating while waiting in the terminals.

[0008] Presently, the luggage carts available in the market at the various terminals contain no provisions for seating the tired waiting traveler. Some patents, however, show equipment handling systems including carts with seats, but all such patents are designed, operate and configured quite differently from the present invention, as will be discussed below:

[0009] U.S. Pat. No. 5,865,710—Wilson-Hyde, Step Aerobic Platform, shows a seat mounted on an aerobic platform and does not attach to a cart. It does not apply to the present invention.

[0010] U.S. Pat. No. 5,695,246—Chim Ho Thai, Seat Device Attached to Baggage Handcart, shows a seat supported by a single center tubular leg to a horizontal seat plate. The plate can rotate about a pin axis and is mounted on the two wheel L-shaped handcart frame whose lower projecting leg supports the baggage, and whose vertical leg contains two wheels at the bottom for wheeling the luggage and the top of this same member is where the traveler handles the handcart and tilts it at an angle to retain the loaded luggage. This patent does not apply to the present invention.

[0011] U.S. Pat. No. 6,237,924—Reiland et al, Shopping Cart with Internal Seat, shows a shopping cart with a seat and basket attached to the front end of the cart and does not apply to the present invention.

[0012] U.S. Pat. No. 5,826,892—Kratzenberg et al, Push Luggage Cart, shows a handcart that contains no seat and only a basket and does not apply to the present invention.

[0013] U.S. Pat. No. D315,904—Adamson et al, shows a luggage cart containing no seat and does not apply to the present invention.

[0014] U.S. Pat. No. 5,439,239—Chung-shiu Su, Collapsible Luggage Cart, shows a collapsible cart and does not apply to the present invention.

[0015] U.S. Pat. No. 4,733,877—Pastien, Cart Apparatus with Improved Handle, shows a cart with an improved handle design that does not apply to the present invention.

[0016] U.S. Pat. No. 4,381,870—Muellner, Versatile Cart Apparatus, shows a cart that contains a fixed aft facing seat or tray and the seat is mounted in a manner that the vehicle can move with the person on it and will roll. The seated person seats high on the cart frame. This patent does not apply to the present invention.

[0017] U.S. Pat. No. D263,127—Muellner, Luggage Cart with Adult Seat, shows the design of a cart with an adult seat fixed and mounted in the cart frame in a manner that the person seats very high on it, and the cart can move or roll while the person is seating. This patent does not apply to the present invention.

[0018] U.S. Pat. No. 5,887,927—Kurek III, Folding Handle Device, shows a folding device that rotates around the eye of a vertical stud that contains a compression spring to retain the handle in the vertical or horizontal position, and it does not apply to the present invention.

[0019] U.S. Pat. No. 5,547,205—Cabedo, Luggage Cart with Attached Seat, shows a four wheel cart that contains a folding seat mounted on the cart structure. The seat is manually rotated to the stow position and the push handle is rotated manually to a vertical position for head clearance. The function of both operations are not connected in the above Patent, while the present invention interconnects these two functions: the up and down movement of the seat, and the rotation of the handle. In the present invention, when optionally a seat is installed on the back of the cart, it is rotated up and down with the cart push handle. In the above Patent the seat is plain, while in the present invention the seat is spring loaded, helping to lift it upward to its stow position, and the rotating push handle is different as it has an extension arm to interface with the seat lift linkage and also contains a double pivot capability to permit laying over 180 degrees forward to clear a container or basket whenever same is part of the cart. In addition, in one embodiment of the present invention, it also shows one or two seats on the side of the cart. In the Cabedo Patent, the seat is supported by two vertical legs interconnected with a cross bar, while the present invention utilizes a single bent support for the seat load. The Cabedo Patent guide link slides up and down the cart structure frame, while the present invention utilizes a fixed pivot to retain the horizontal guide link. There is also a major difference on how to support the weight on the seat: the Cabedo Patent supports the load with a diagonal truss member and two vertical tubes, while the present invention utilizes only a guided bent vertical tube to support the seat. The basics of the two inventions are different and the referred to Cabedo Patent does not apply to the present invention.

[0020] U.S. Pat. No. 4,460,215—Chamberlain et al, Folding Seat Assembly, shows a folding seat assembly that folds against a wall, and the linkage and folding hinge assembly does not apply to the present invention.

[0021] U.S. Pat. No. 2,257,211—V. Willoughby, Seat, shows a seat that folds against a wall and the hinge assembly and support frame are mounted differently to the seat and in the folded up position the seat is locked up against the wall in such way that it does not apply to the present invention.

[0022] U.S. Pat. No. 5,213,360—Chin-Feng Lin, Push Car, shows that this patent is primarily a two wheel frame that contains a flexible seat for a baby on a luggage hand car, and does not apply to the present invention.

[0023] U.S. Pat. No. 5,374,073—Hung-Hsin, Tractive Baggage Handcart, shows a two wheeled handcart that comprises a travel case, a tractive retractable device on back of said travel case, a tie belt and a foldable chair, and it does not apply to the present invention.

[0024] U.S. Pat. No. 5,161,811—Cheng, Trolley with a Foldable Seat, shows a foldable seat assembly mounted on a hand cart and the seat support assembly contact the soil by means of two pair of stands, and does not apply to the present invention.

[0025] U.S. Pat. No. 3,170,709—J. T. Shackel, Utility Carts, shows a seat mounted and fixed on the front part of an utility cart and does not apply to the present invention.

[0026] U.S. Pat. No. 1,869,365—G. F. Corduan, Chair, shows a metal folding chair not attached to a wheeled baggage cart and which in turn, the parts, design and construction do not apply to the present invention.

[0027] U.S. Pat. No. 1,692,930—E. W. Cummings, Foldable Service Board, shows a service board folding against the wall and the configuration, parts and foldable system do not apply to the present invention.

[0028] German Patent #911173—Hubner, Foldable Garden Chair, shows a foldable chair that runs in a slot, and it does not apply to the present invention.

BRIEF SUMMARY OF THE INVENTION

[0029] The present invention provides a means for the attachment of a folding seat that can be attached to the side, or to the back, of any typical baggage cart, and provides a means for convenient automatic positioning of such seat and the necessary rotation of the push/pull handle to achieve needed head room.

[0030] The lateral seat, when rotated down to the seated deployed position, has an extended support that rotates from the bottom side of the seat, outward and down to support the weight of the seated user, and conveys this weight load directly to the floor level that the baggage cart rests upon. This extension of the support is positioned vertically beneath the seat by a rotating guide link attached to the luggage cart frame. The seat rotates to the horizontal level seated position, and rotates to the stowed vertical flat against the cart structure position by two or more hinge fittings that attach to the baggage cart structure. The extended load support beneath the seat is attached to the bottom of the seat near its center with two fittings that provide rotational capability to the seat support. The embodiment of this support is shown as a U-shape bent tube with the two vertical legs engaging the previous discussed rotational fittings. The two guide links are attached at one end to the luggage cart support structure, and at the other end, to the two vertical legs of the extended U-shape bent tube seat support. The seat is spring loaded to the stowed position so that the baggage cart is at all times ready to be moved throughout the terminal, by the user, when needed. This spring lifts the seat off the floor as soon as the user stands up, but the seat is always ready to be manually moved down to the deployed position, by the user, whenever needed, by downward pressure. When seated, the user's weight on the seat retains it in the horizontal level position. The light weight spring assemblies, in the seat hinge, require a light load to overcome their return to stowed baggage cart mobile position.

[0031] As a second embodiment, the seat assemblage can be mounted on either side of any typical conventional luggage cart now in use at the terminals. If desired, a seat assemblage can be installed on both sides of the cart and provide seating for more than one person.

[0032] As a third embodiment, this spring seat assemblage can also be attached to the back of the cart and for such purpose the present invention also provides a means for rotation of the push handle, which rotation is provided by a mechanism that simultaneously moves the seat from the stowed up position to a deployed ready-to-seat position. This is necessary for the back seat assembly embodiment inasmuch as the horizontal push handle, projecting aft from the cart, interferes with the head room of the seated user. Rotation of the handle up, and out of the way, provides a means for also deployment of the spring driven seat to its operating position. This invention provides the means for combining the rotation of the handle and rotation of the seat from the folded up position to the extended down seating position in one sole operation, thus linking together both operations with a simple linkage that can be attached to any sort of cart or equivalent. The present invention mitigates and/or obviates the afore described head room disadvantage and improves the fold up function and packaging of the folded seat in the folded up position, ensuring that when the handle is rotated down, the seat will be folded up into its stowed position and the legs of the assembly have been lifted up, and off the floor, and will not drag when the cart loaded with luggage is pushed around the terminal. As the said handle is rotated from the horizontal level position to the vertical head clearance position, two extension arms attached to the push handle, and extending beyond the said handle rotation pivot, also rotate. When the said push handle rotates upward, the extension arms, being on the opposite side of the pivot, rotate downward around the said pivot. Attached to the end of each extension arm is a long link that connects to two seat fittings, one on each side of the seat. Each fitting is firmly attached to the seat frame and at a reasonable distance away from the seat pivot hinge, in order to provide good leverage for movement of the seat in a rotational direction. As the push handle is rotated upward, the extension arm rotates downwards and pushes the long side links downward which, in turn, drive the seat from the stowed vertical attitude to a horizontal level attitude, for traveler seating accomodation. In reverse, the push handle being rotated downward, from its upright vertical position, in turn rotates the two extension arms upward and pulls on the long links attached at their ends, and by pulling on these links they pull upward on the seat assembly and rotate it to a stowed vertical position. Rotation to this position lifts the seat vertical legs upward off of the floor, and stows them in a vertical attitude, folded under the stowed seat assembly in a compact position. Installed within the seat hinge is the spring device. The seat and a seat back board contain cushing provisions for comfort of tired traveler. With the seat in the stowed up location, the cushioned seat and the cushioned back are brought together face to face. To ensure that the seat is secured in the folded up position, the linkage travels over-center to latch the seat in the upright stow attitude to prevent the seat and handle from being rotated accidentally. The cart user merely releases the overcenter lockup condition by pulling on the handle when he wishes to extend the seat, or fold it up for cart with luggage movement.

DETAILED DESCRIPTION OF THE INVENTION

[0033] Referring to the Drawings and initially to FIG. 1, the invention comprises generally of a foldable seat assembly (21) that can be installed on any conventional luggage cart (22) that contains a relatively level platform or base frame (23) that in turn contains wheels (24) for moving the cart with baggage, and having a vertical tubular structure (25) that provides a means for the traveler to push the mobile luggage cart (22) containing the baggage, packages or equivalent stacked upon the said base frame (23). The said tubular vertical support structure (25) generally holds a container or basket (26) for holding small items or hand carried possessions. In addition this said upright vertical structure (25) contains a handle assembly (27) that is used for pushing and guiding the said luggage cart (26) around the terminals, parking lots and ticketing counters while servicing the incoming or outgoing travelers. The afore description represents the basics of the luggage carts used at terminals throughout the world at airports, train and ship facilities. The present invention attaches to the said luggage cart (22) and provides it with one or two seats (28) for use by tired travelers, and is characterized by a folding seat assembly (21) that can be attached to the said luggage cart (22) in various locations. The preferred embodiment of this invention is to install the said foldable seat assembly (21) on the side of the said cart (22). The said foldable seat assembly is comprised of a said seat (28) shown in FIG. 2 that can be round, square, rectangular or any shape, and is hinged to the said cart's structure with a clamp or hinge fitting (29) that clamps to the cart said tubular vertical support structure (25). The said luggage cart (22) with the said folding seat assembly (21) in the extended down seat position is shown in FIG. 3. When the said seat (28) is disployed down to this seat position, a guide link (30) guides the seat to the correct horizontal level position during rotation from the stowed up location to the ready-to-sit location. The said guide link (30) is attached at one end to the cart's structure and at the other end to a tubular frame (31) and at both attachment points the said guide link (30) can rotate as the said folding seat is rotated down. The said guide link (30) being attached to the said tubular support frame (31) positions it directly beneath the said seat (28) in a vertical attitude for supporting the weight of the seated user. The said support frame (31) transfers the seat loads directly down to the floor and prevents movement of the said cart when the said seat is being occupied. FIG. 4 shows a side view of the said seat assembly attached to the said cart's vertical structure in the folded up stowed position and FIG. 5 shows the side view of the said seat assembly (28) hinged down to the seated location. The said seat (28) contains internal stiffeners to make the seat rigid or it is made of a material inherently rigid such as wood, metal or plastic for strength from bending and for support the weight of a person. The said support frame (31) is attached to the said seat (28) at a fitting (32) that permits the said frame (31) to rotate from the vertical position to the stowed position. The said folding seat said hinge fitting (32) is clamped to the cart's said structure and contains a torsion spring (33) that returns the said folding seat to the upright stowed position when the user leaves the seat. This ensures that the seat is returned to the stowed position and ensures that the said tubular frame (31) is lifted off the floor and permits movement of the said cart (22). On the bottom of the said tubular frame (31) there is a rubber pad (46) that contacts the floor and helps prevent movement of the said cart and the scratching of the floor when the seat is occupied. The said guide link (30) ensures the said frame is positioned in the vertical and the said seat (28) is level. The said guide link (30) is attached to the said cart's structure with a clamp on attachment fitting (34) that permits rotation of the said guide link. When the said folding seat assembly (21) is installed on the back of the said cart (26) at a position shown in FIG. 6 the said cart's push/pull handle interferes with the head room of the seated user and thus is rotated to a vertical position for head room clearance. FIG. 7 shows the folding seat assemblage in the down position ready for the user to sit upon the seat. Inasmuch as the seat push handle (27) must be rotated out of the way in this embodiment of the invention, the rotation movement of the said handle is used to deploy the said seat to the down position and to retract it to the up stowed position. The linkage shown in FIG. 8 and FIG. 9 illustrates the arrangement in the two positions. An extension arm (35) is attached with screws (36) and extends the movement of rotation around a pivot fitting (37) installed in the said handle assembly (27) so that when the said handle is rotated upward to the head clearance location the said extension arm (35) being forward of the said pivot (37) rotates downward and a long link (38) attached to the end of the said extension arm is moved downward. Since the other end of the said long link (38) is attached to the said seat (28) the seat is rotated downward to the level horizontal position for user's use. The said long link (38) is attached to the said seat (28) at a location (39) that provides it good leverage to raise and lower the said seat around the said hinge fitting pivot (29) that contains a said torsion spring (33) that raises the seat support frame (31) off the floor. A padded seat back (40) is attached to the said luggage cart (22) between the two upright structural members on the said cart. When the said seat (28) is rotated to the upward stowed position, the said seat (28) folds against the said seat back (40) as shown in FIG. 8. To ensure that the rotation function of the said push/pull handle (27) does not interfere with the function of placing items in cart's container or basket (41) a coupling assembly (42) is inserted in the interface joint where the push/pull handle attaches to the said luggage cart structure (22). This said coupling (42) contains two pivot points (43) that each provide 90 degrees of rotation capability to permit the said handle (27) to rotate from an aft horizontal positon to a forward horizontal position 180 degrees, as shown in FIG. 10, and places it out of the way for placing possessions into the said container or basket (41). An additional embodiment of the invention is shown in FIG. 11 and installs the said folding seat assembly (21) on to a corner post structure on the said luggage cart (22). The said seat assembly (21) is clamped to the said corner post with a multiple hinge fitting (44) that has provisions for seat folding up and down from the stowed position to the level user position and has rotational capability for movement of the seat when it is in a level horizontal attitude. This permits the seat to be located both on the side of the said luggage cart (22) and be moved around to the back of said luggage cart. The said multiple hinge fitting (44) is shown in FIG. 12 and provides the seated user availability to position him or herself in several positions while waiting and watching the baggage resting on the said luggage cart (32). In this embodiment the said seat is manually raised and lowered and rotated to the desired operating positions. The said multiple hinge assembly contains a torsion spring to raise the seat when it is not occupied to the stowed position. This said multiple hinge assembly supports the said seat by transferring the weight load of the seated user to the cart's supporting structure. The said multiple hinge fitting (44) contains shoulder stops (45) to prevent the seat from rotating too far beyond the correct operational positions. The embodiments presented provide for unbalanced seating loads and can accommodate sizeable body weight without structural failure to either the cart structure or the said luggage cart components.

[0034] Although the description above contains many specifications, these should not be construed as limiting the scope of the invention, but as merely providing illustrations of some of the present embodiments of the invention. Further objectives and advantages of all embodiments of the present invention will become apparent and reside in the details of construction, operation and enclosed drawings, and more fully herein described and claimed, reference being added in the accompanying drawings forming a part hereof. 

I claim singly, or in consert with, or in combination:
 1. A folding seat that is attached to the side of a baggage or luggage cart, comprising: a round, square, rectangular or any shape seat hinged or pivotally attached to structural support members that frame the luggage cart, a seat that can be attached with interface fittings that can be clamped, bolted, riveted or welded to the structural tubular frame of the cart, a seat that when pivoted to the vertical position will stand upright against the cart, will not project outward away from the cart, and is in a position to be stowed when the cart is operated, a seat that contains internal stiffeners to make the seat rigid and support the weight of a person resting upon it, or made of a material inherently rigid such as wood, metal or plastic, for strength from bending and can support the person's weight, a seat that contains on its underside a U-shaped bent support member that is attached at or near the center of the seat and can rotate from a vertical position under the seat to a position flat against the seat when the seat is rotated up to the stowed location for cart mobility, a U-shaped bent support member that when moved to the vertical position supports the seat and transfers the seated person's weight in compression to the ground or floor, a pair of guide links that guide the U-shaped bent support member during rotation from the vertical position to the stow position, a guide link that is attached at one end to the cart structure and the other end to the U-shaped bent support member, a fitting at each end of the guide links that permits the guide link to rotate both at the seat attachment and at the U-shaped bent support member attachment, a lightly loaded torsion spring installed within the seat hinge to raise and rotate the seat to the vertical stow position to ensure that the seat when unoccupied is up off the floor and the cart is in a position ready to be moved to a new location, a seat that can be installed on either side, both sides, or back side of a luggage cart or equivalent,
 2. A linkage that can rotate a baggage or luggage cart seat from a stowed up position to an extended down position ready for the traveler to rest upon it, comprising, a seat similar to or equivalent to seat of claim 1 that can be rotated about a hinge attached to the structure of a luggage cart, a linkage attached to the seat and to the structure of the luggage cart that when the cart push/pull handle is rotated up to provide seated head room for the traveler which rotation motion and function will rotate the seat about its hinge and stow it in an upright folded tight position against the cart structure for ready movement of the cart, a push-pull handle on the luggage cart that can be rotated from the horizontal level position to the vertical head clearance position comprising of a connecting fitting that is attached to the cart structure and the handle that rotates around an in line pivot joint attached to each leg of the bent handle, an extension arm attached to each leg of the rotating push/pull handle that extends beyond the said rotation pivot, an extension arm that when the push/pull handle is rotated upward, the end of the extension arms rotate downward around the said pivot point, an extension arm that has attached to its projecting end a long connecting link to connect with the seat, an extension arm that when rotated in turn downward pushes downward on the long connecting link and, as its other end is attached to the seat, it rotates the seat to a horizontal level position ready for seating the traveler, a long connnecting link that contains pivot points at each end for attachment to the extension arm and to the seat, a seat that contains provisions for attachment of a pivot for the long connecting link, for a pivot for the seat underside support U-shaped support member and provisions for hinge attachment of the seat to the luggage cart structure, an optional embodiment of the push/pull handle to provide additional head room and provide increased access to any container or basket mounted on the luggage cart, a push/pull handle that permits the handle, when it is not apart of the rotation linkage, to be able to be rotated from the horizontal position and be rotated up and over 180 degrees to a horizontal attitude forward of the rotation pivot axis point, a fitting installed in the push/pull handle that is comprised of two pivot points each providing 90 degrees rotation capability to the handle for a total of 180 degrees of handle rotation, a fitting installed or pressed in the end of the push/pull tubular legs of the handle and into the tubular structure of the luggage cart for ease of assembly of the handle.
 3. A folding seat that is attached to the back side of the luggage cart corner post and can be rotated around the corner post and can be retracted upward and flat against the backside of the cart's structure, comprising of: a seat that is supported by a multiple hinge that can be bolted to or clamped to and around the cart's corner structural corner post, a seat that the multiple hinge has welded to, or molded to it, a fitting that flanges out for the seat to bear upon on the underside of the seat, a multiple hinge fitting that contains a hinge type pivot to permit the seat to rotate upward for stow while still being firmly attached to the cart support structure, a multiple hinge fitting that is attached at one end to the center of the seat on the underside and whose other end can rotate around the cart tubular support corner structure, a multiple hinge fitting that can support the weight of the seated user and when hinged in the various directions the imposed loads are taken out against fixed end stops, a torsion spring installed in the multiple hinge that contains a hinge type pivot to lift the horizontal seat to a vertical position when no person is seated upon it, a seat that can be rotated vertically by the torsion spring in either position, that is, when the seat is rotated to the side seating position, or when the seat is rotated to the cart's back seated position, a seat that is permitted to move to either of these positions by the rotation within the multiple hinge fitting, a folding seat assembly that allows the cart to be stacked in tandem with other carts when the seat is in the stow position, for mobility around the terminal. 